GHSA-RM79-9RVW-RJV2

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

char: applicom: fix NULL pointer dereference in ac_ioctl

Discovered by Atuin - Automated Vulnerability Discovery Engine.

In ac_ioctl, the validation of IndexCard and the check for a valid RamIO pointer are skipped when cmd is 6. However, the function unconditionally executes readb(apbs[IndexCard].RamIO + VERS) at the end.

If cmd is 6, IndexCard may reference a board that does not exist (where RamIO is NULL), leading to a NULL pointer dereference.

Fix this by skipping the readb access when cmd is 6, as this command is a global information query and does not target a specific board context.

Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-68797"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nchar: applicom: fix NULL pointer dereference in ac_ioctl\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.\n\nIn ac_ioctl, the validation of IndexCard and the check for a valid\nRamIO pointer are skipped when cmd is 6. However, the function\nunconditionally executes readb(apbs[IndexCard].RamIO + VERS) at the\nend.\n\nIf cmd is 6, IndexCard may reference a board that does not exist\n(where RamIO is NULL), leading to a NULL pointer dereference.\n\nFix this by skipping the readb access when cmd is 6, as this\ncommand is a global information query and does not target a specific\nboard context.",
  "id": "GHSA-rm79-9rvw-rjv2",
  "modified": "2026-01-13T18:31:04Z",
  "published": "2026-01-13T18:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68797"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b8b353e09888bccee405e0dd6feafb60360f478"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.